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Paper detail

Spontaneous exciton dissociation in carbon nanotubes

Simultaneous photoluminescence and photocurrent measurements on individual single-walled carbon nanotubes reveal spontaneous dissociation of excitons into free electron-hole pairs. Correlation of luminescence intensity and photocurrent shows that a significant fraction of excitons are dissociating during their relaxation into the lowest exciton state. Furthermore, the combination of optical and electrical signals also allows for extraction of the absorption cross section and the oscillator strength. Our observations explain the reasons for photoconductivity measurements in single-walled carbon nanotubes being straightforward despite the large exciton binding energies.

preprint2013arXivOpen access
Y. KumamotoM. YoshidaA. IshiiA. YokoyamaT. ShimadaY. K. Kato
cond-mat.mes-hall
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Y. KumamotoM. YoshidaA. IshiiA. YokoyamaT. ShimadaY. K. Kato

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